Hello,
for some reason, my 7700s is not detected anymore. It worked after i received it (Batch 17), the i swapped it for the normal Bay for some time and now i wanted to change it back to the GPU (also swapped memory as mine was not supported and now i got supported sticks)
In the Bios the point “Expansion Bay” says: “Not detected”, the module seems to be placed correct and setting the Bios to default did not help too.
Does anybody has an idea what the issue could be? 
Did you remember to switch out the shell interposer for the graphics module interposer?
Graphics interposer: Framework
Shell interposer: Framework
Yes, the interposer is the one for the GPU